Why We Like The Garmin Edge 840 Solar Bike Computer
The Garmin Edge 840 Solar Bike Computer brings all of the features we love about the Edge 840 with the unique addition of solar charging. When charging in direct sunlight, our battery will last up to 60 hours, adding up to 25 minutes per hour while in battery saver mode to allow longer rides. When used with a compatible heart rate monitor or power meter, we are provided with adaptive coaching, personalized workouts, and stamina insights to help us gauge how much is left in our tank. Whether riding on the road, gravel, or deep in the woods on our favorite dirt trail, the integrated multi-band GNSS technology ensures we stay on the path with superior location accuracy.
Details
- The same Edge 840 we know and love with the addition of solar charging
- Battery life lasts up to 60 hours when charging in direct sunlight
- Responsive touch screen and button controls combine for simple use
- Personalized insights when connected to a power meter or HR monitor
- GNSS multi-band technology keeps us riding through dense trees
- Syncs to the Garmin Connect app to share with Strava, TrainingPeaks, etc
- Item #GRMF06J
- Housing Material
- silicone
- Clock
- yes
- Wireless
- yes
- Backlight
- yes
- Water-Resistant
- IPX7
- Battery Type
- Lithium ion cell contained in equipment
- Battery Life
- [demanding use] up to 32 hours, [battery saver mode] up to 60 hours
- Low Battery Indicator
- yes
- Mount Type
- out-front mount, standard mount
- Includes
- Edge 840 Solar, out-front mount, standard mount, tether, USB-C cable, documentation
- Dimensions
- 2.3 x 3.4 x 0.8in
- Face Size
- 2.6in (diagonal)
- Claimed Weight
- 84.9g (3.0oz)
- Manufacturer Warranty
- limited
- Activity
- cross-country, enduro, gravel, road cycling, trail
Reviews
Q&A
What do you think about this product?
Overall Rating
4 based on 86 ratings
Review Summary
Here's what customers have to say
The bike computer offers a range of features, including connectivity, touchscreen, and solar charging, which is seen as a valuable addition by many users. The device is praised for its accuracy, battery life, and data tracking capabilities. However, some users have experienced issues with syncing activities, bugs, and finding the setup and use a bit overwhelming initially. Overall, the product is viewed as a significant upgrade over previous models, with a mix of positive and negative reviews.
AI-generated from the text of customer reviews.
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Selecting an option will reload the available reviews on the pageJune 29, 2025
Great upgrade for me
I've used a garmin 820 for several years now and have been happy with it. But decided it was time to upgrade so after reading many reviews I went with the 840 solar. My rides are never too long but I thought the solar part would be a good back up in case I was out longer than usual. No issues so far and I'm happy with the purchase! Many thanks Garmin
Originally reviewed on Garmin
June 16, 2025
Solar is amazing
840 solar is a game changer and in a smaller size computer compared to the 1030 or 40 etc. Love it. Does everything I need and more. Super simple set up from my Garmin profile. Just copied everything from my 530. Simple!
Originally reviewed on Garmin
June 8, 2025
A lot more tools and features
So far so good. Really like some of the new functionality. Still learning and getting used to using the new features
Originally reviewed on Garmin
June 6, 2025
Returned Garmin 840 Solar
My Garmin 840 experienced persistent issues from the beginning, frequently freezing during use. On multiple occasions, I was forced to restart the ride on the device. Notably, these problems only occurred when using the navigation feature—which is essential for my bikepacking plans this summer, as reliable navigation is the primary reason I purchased a bicycle computer.
Originally reviewed on Garmin
May 9, 2025
Perfect bike computer
This is an upgrade for me from an older edge and it is amazing. My older Garmin was great when I first got it but after many years it started lagging behind technology. This device has all the whistles and with the solar option it really extends my ride time for ultra long rides. Highly recommend for anyone who needs reliability or all the techie stuff.
Originally reviewed on ExpertVoice.com
May 6, 2025
Great features
Purchased this a month ago and it is fantastic! Extremely easy to operate
Originally reviewed on Garmin
April 25, 2025
840 Synching problems
It has multiple issues with synching. I can see it in history, but it doesn't come over to the phone or laptop. Super frustrating.
Originally reviewed on Garmin
April 20, 2025
Just learning
This was a gift and I am just getting started learning the features. So far it has been pretty easy to load a route and save the ride. I need to make the font a little larger or at least define the contrast better. Let me know if that is possible
Originally reviewed on Garmin
April 11, 2025
840 Solar
So far it’s amazing, I just need to get used to all of the features
Originally reviewed on Garmin
April 6, 2025
Great tool to improve training and performance
Compatible with all you bike sensors and gadgets, great tool to maximize, track and improve your rides. Touch screen is a great advantage to toggle between screens during rides. Recommended
Originally reviewed on Garmin
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